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Inflow Condition Effects on Large Eddy Simulations of Variable Density Mixing Layers

conference contribution
posted on 12.02.2018, 10:43 by J. X. Huang, S. N. Hug, William A. McMullan
In this paper we present the results from a series of Large Eddy Simulations of the variable density plane turbulent mixing layer. Local Reynolds numbers, based on the velocity difference across the layer and its visual thickness, of up to 250,000 are achieved. The purpose of this study is to assess the effect of the nature of the inflow conditions on the vortex structure in the variable density mixing layer. A mixing layer originating from initially-laminar conditions with pseudo-random perturbations does not contain a spatially stationary streamwise vortex structure for any value of density ratio. Imposing physically-correlated fluctuations on the initially-laminar flow produces a mixing layer that does contain a spatially stationary structure for all density ratios. The evolution of this streamwise structure compares well with experimental observation. The asymptotic scaling of the streamwise structure wavelength to local vorticity thickness is independent of the density ratio, in agreement with previous experimental findings.

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Citation

23RD AIAA Computational Fluid Dynamics Conference, AIAA AVIATION Forum, 2017

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Source

23RD AIAA Computational Fluid Dynamics Conference, AIAA AVIATION Forum, Denver, Colorado. 5-9 June 2017

Version

VoR (Version of Record)

Published in

23RD AIAA Computational Fluid Dynamics Conference

Publisher

American Institute of Aeronautics and Astronautics

isbn

978-1-62410-506-7

Copyright date

2017

Publisher version

https://arc.aiaa.org/doi/abs/10.2514/6.2017-3295

Notes

The file associated with this record is under a permanent embargo in accordance with the publisher's policy. The full text may be available through the publisher links provided above.

Temporal coverage: start date

05/06/2017

Temporal coverage: end date

09/06/2017

Language

en

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